CN103116139B - Street lamp fault detection method, pick-up unit and detection system thereof - Google Patents
Street lamp fault detection method, pick-up unit and detection system thereof Download PDFInfo
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- CN103116139B CN103116139B CN201310024655.8A CN201310024655A CN103116139B CN 103116139 B CN103116139 B CN 103116139B CN 201310024655 A CN201310024655 A CN 201310024655A CN 103116139 B CN103116139 B CN 103116139B
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Abstract
The invention discloses a kind of street lamp fault detection method, comprise the steps: the actual current variation characteristic curve obtaining target street lamp; When the actual current variation characteristic curve obtained and preset normalized current variation characteristic curve are misfitted, then determine that described target street lamp breaks down.The invention also discloses a kind of road lamp failure detection device and detection system thereof.Adopt technical scheme of the present invention, the street lamp broken down can be detected exactly, especially the street lamp occurring electrical type ballast resistor or inductor ballast fails can be judged exactly, improve the accuracy of carrying out when street lamp fault detects, thus make staff can the street lamp that breaks down of on-call maintenance, meet the normal demand of city street lamp illumination.
Description
Technical field
The present invention relates to street lamp fault detection technique, particularly relate to the street lamp fault detection method, pick-up unit and the detection system thereof that detect for street lamp fault.
Background technology
Street lamp is the requisite facility of city night illumination, but street lamp can reach serviceable life because of the working time or cause its fault because of other reasons, causes it cannot continue illumination.Therefore need to detect the working condition of street lamp, so that can on-call maintenance when street lamp breaks down, thus meet normal city illumination demand.But along with the continuous growth of street lamp quantity, the laying scope of street lamp is also constantly expanding, and correspondingly street lamp quantity also constantly increases.Therefore, how effectively to carry out the fault detect of street lamp, can but become the difficult problem that works by on-call maintenance when street lamp breaks down.
At present, the usual detection mode of street lamp fault is: the current value that the current transformer adopting detecting unit to detect street lamp exports, and this current value and the amplitude thresholding preset is compared, and judges whether street lamp normally works according to comparative result.If detect the current value obtained to be greater than default amplitude thresholding, then judge that street lamp normally works; If detect the current value obtained to be less than default amplitude thresholding, then judge that street lamp breaks down.
But this kind of mode also exists certain limitation.Such as, for the street lamp comprising luminophor and inductor ballast resistor, or comprise the street lamp of luminophor and electrical type ballast resistor, the place of breaking down is likely luminophor itself, is also likely ballast resistor.Luminophor breaks down or ballast resistor breaks down all can cause street lamp can not normal luminous.Such as, when inductor ballast resistor breaks down, be short trouble in a lot of situation, now flow through the curent change of street lamp and not obvious.Therefore, if the electrical type ballast resistor of street lamp breaks down or inductor ballast resistor breaks down, adopt aforesaid way but to differ and detect surely, in other words, when adopting said method to carry out street lamp fault detection, there is the higher problem of misdetection rate.
Summary of the invention
For prior art above shortcomings, the invention provides a kind of street lamp fault detection method, road lamp failure detection device and the street lamp fault detection system thereof that can detect street lamp fault exactly.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
Street lamp fault detection method, comprises the steps:
Obtain the actual current variation characteristic curve of target street lamp;
When the actual current variation characteristic curve of described acquisition and preset normalized current variation characteristic curve are misfitted, then determine that described target street lamp breaks down.
Further, when misfitting when the actual current variation characteristic curve of described acquisition and preset normalized current variation characteristic curve, then, before determining that described target street lamp breaks down, also comprise:
Judge whether actual current variation characteristic curve and the preset normalized current variation characteristic curve of described acquisition coincide.
Further, the step of the actual current variation characteristic curve of described acquisition target street lamp, specifically comprises:
Within the cold start time, multi collect flows through the current signal of described target street lamp, obtains and gathers moment multiple current value one to one;
According to described multiple current value, complete the drafting of the actual current variation characteristic curve of described target street lamp.
Further, judge specifically to comprise the step whether the actual current variation characteristic curve of described acquisition and preset normalized current variation characteristic curve coincide:
When the mean value of described multiple current value is less than default first threshold, then determine that described actual current variation characteristic curve and preset normalized current variation characteristic curve are misfitted;
When the mean value of described multiple current value be greater than default first threshold and the goodness of fit of described actual current variation characteristic curve and preset normalized current variation characteristic curve not in default error range time, then determine that described actual current variation characteristic curve and preset normalized current variation characteristic curve are misfitted;
Wherein, the goodness of fit refers to the similarity degree of actual current variation characteristic curve and normalized current variation characteristic curve.
Further, judge specifically to comprise the step whether the actual current variation characteristic curve of described acquisition and preset normalized current variation characteristic curve coincide:
When the mean value of described multiple current value is less than default first threshold, then tentatively judge that open fault appears in described target street lamp; Add up and store and tentatively judge that the read-around ratio of open fault appears in described target street lamp; When described target street lamp occurs that the read-around ratio of open fault is greater than default Second Threshold, then determine that described actual current variation characteristic curve and normalized current variation characteristic curve are misfitted;
When the mean value of described multiple current value be greater than default first threshold and the goodness of fit of described actual current variation characteristic curve and preset normalized current variation characteristic curve not in default error range time, then tentatively judge that short trouble appears in described target street lamp; Add up and store and tentatively judge that the read-around ratio of short trouble appears in described target street lamp; When described target street lamp occurs that the read-around ratio of short trouble is greater than the 3rd default threshold value, then determine that described actual current variation characteristic curve and normalized current variation characteristic curve are misfitted;
Wherein, the goodness of fit refers to the similarity degree of actual current variation characteristic curve and normalized current variation characteristic curve.
Correspondingly, present invention also offers a kind of road lamp failure detection device, comprising:
Acquisition module, for obtaining the actual current change curve of target street lamp;
Fault determination module, when misfitting for the actual current family curve that obtains at described acquisition module and preset normalized current variation characteristic curve, determines that described target street lamp breaks down.
Further, described road lamp failure detection device, also comprises:
Judge module, for judging whether the actual current change curve that described acquisition module obtains and preset normalized current variation characteristic curve coincide;
Described fault determination module, specifically for when the judged result of described judge module is no, determines that described target street lamp breaks down.
Further, described acquisition module, the current signal of described target street lamp is flow through specifically for multi collect within the cold start time, obtain and gather moment multiple current value one to one, and according to described multiple current value, complete the drafting of the actual current variation characteristic curve of described target street lamp.
Further, described road lamp failure detection device, also comprises:
Testing result reporting module, after determining that in described fault determination module described target street lamp breaks down, reports to control center by the testing result that described target street lamp breaks down.
Correspondingly, present invention also offers a kind of street lamp fault detection system, comprising:
At least one road lamp failure detection device, for when the actual current family curve of described target street lamp and preset normalized current variation characteristic curve are misfitted, determine that described target street lamp breaks down, and the testing result that described target street lamp breaks down is reported to central control unit;
Central control unit, for receiving and analyzing the testing result that described road lamp failure detection device reports, and presents to keeper by the particular location of the target street lamp broken down.
Compared to existing technology, the present invention has following beneficial effect:
Technical solutions according to the invention are adopted to carry out street lamp fault detection, whether the actual current variation characteristic curve of target street lamp and preset normalized current variation characteristic curve coincide due to what compare, therefore, when there is short trouble in target street lamp, the actual current variation characteristic curve of target street lamp is inevitable misfits with normalized current variation characteristic curve, therefore technical scheme of the present invention is adopted can to detect the street lamp broken down exactly, especially the street lamp occurring electrical type ballast resistor or inductor ballast fails can be detected exactly, avoid the problem of failing to judge adopting amplitude threshold method to occur, thus improve the accuracy of carrying out when street lamp fault detects.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the first embodiment of street lamp fault detection method provided by the invention;
Fig. 2 is the characteristic schematic diagram of curent change that target street lamp flows through target street lamp when normally working;
Fig. 3 flows through the characteristic schematic diagram of curent change of target street lamp when being target street lamp generation open fault;
Fig. 4 be target street lamp be short-circuited fault time flow through the characteristic schematic diagram of curent change of target street lamp;
Fig. 5 is the schematic flow sheet of the second embodiment of street lamp fault detection method provided by the invention;
Fig. 6 is the schematic flow sheet of the 3rd embodiment of street lamp fault detection method provided by the invention;
Fig. 7 is the schematic flow sheet of a kind of embodiment of step S202 in Fig. 2;
Fig. 8 is the schematic flow sheet of the another kind of embodiment of step S202 in Fig. 2;
Fig. 9 is the schematic flow sheet of the 4th embodiment of street lamp fault detection method provided by the invention;
Figure 10 is the structural representation of the first embodiment of road lamp failure detection device provided by the invention;
Figure 11 is the structural representation of the second embodiment of road lamp failure detection device provided by the invention;
Figure 12 is the structural representation of the embodiment of street lamp fault detection system provided by the invention.
Embodiment
Below in conjunction with specific embodiments and the drawings, the present invention is further detailed explanation.
As shown in Figure 1, be the schematic flow sheet of the first embodiment of a kind of street lamp fault detection method provided by the invention, described method comprises:
Step S101, obtains the actual current variation characteristic curve of target street lamp;
Wherein, target street lamp of the present invention, can be mounted in the street lamp on road cowl lamp bar, also can be hang over the street lamp on tunnel wall, and the type of street lamp includes but not limited to high-pressure mercury lamp, Non-polarized lamp, conventional LED and light-adjustable LED lamp.Said actual current variation characteristic curve in this step, is used to the curve flowing through the variation characteristic of street lamp actual current when identifying target street lamp real work.When this actual current variation characteristic curve is specifically according to the real work of target street lamp, draws in the multiple actual current value not flowing through target street lamp in the same time and form.Therefore, before the actual current variation characteristic curve obtaining target street lamp, need multiple not in the same time acquisition stream cross the actual current of target street lamp.The number of times gathering actual current value is more, and the actual current variation characteristic curve drawn out is more close to the actual current variation tendency of target street lamp.
Step S102, when the actual current variation characteristic curve obtained and preset normalized current variation characteristic curve are misfitted, then determines that described target street lamp breaks down.
Normalized current variation characteristic curve described in step S102, is used to identify the curve flowing through the variation characteristic of target street lamp normalized current when target street lamp normally works.This normalized current variation characteristic curve specifically when target street lamp normally works, according to the curve that the multiple standard current value not flowing through target street lamp are in the same time drawn.Therefore, when pre-set criteria curent change family curve, the standard current value of multi collect target street lamp is needed.The number of times gathering standard current value is more, and the normalized current variation characteristic curve drawn out just precisely.
In embodiments of the present invention, whether actual current variation characteristic curve and normalized current variation characteristic curve coincide, refer to the goodness of fit of actual current variation characteristic curve and normalized current variation characteristic curve whether in default error range, if the goodness of fit of actual current variation characteristic curve and normalized current variation characteristic curve is in default error range, then determine actual current variation characteristic curve and normalized current variation characteristic curves, if the goodness of fit of actual current variation characteristic curve and normalized current variation characteristic curve is not in default error range, then determine that actual current variation characteristic curve and normalized current variation characteristic curve are misfitted.Wherein, error range can specifically set as required.
If target street lamp normally works, so this target street lamp is from cold start to normal work, and the electric current flowing through street lamp has obvious change.As shown in Figure 2 (V1 is less than V2), its curent change trend step-down tending towards stability gradually.When the ballast resistor of street lamp is short-circuited fault or open fault, its curent change is all not obvious, as shown in Figure 3,4.Therefore, when carrying out street lamp fault and detecting, according to traditional amplitude threshold method, so when the inductor ballast resistor of street lamp breaks down, owing to flowing through the curent change of street lamp when being short-circuited fault or open fault and not obvious, therefore, adopt traditional amplitude thresholding rule to there is the problem that can not detect the street lamp broken down exactly, thus when making to carry out street lamp fault detection, misdetection rate is higher.And adopt the method described in the present embodiment to carry out street lamp fault detection, whether the actual current variation characteristic curve of target street lamp and preset normalized current variation characteristic curve coincide due to what compare, therefore, when there is short trouble in target street lamp, the actual current variation characteristic curve of target street lamp is inevitable misfits with normalized current variation characteristic curve, therefore the method for the embodiment of the present invention is adopted can to detect the street lamp broken down exactly, especially the street lamp occurring electrical type ballast resistor or inductor ballast fails can be detected exactly, thus improve the accuracy of carrying out when street lamp fault detects.
As shown in Figure 5, be the schematic flow sheet of the second embodiment of a kind of street lamp fault detection method provided by the invention, described method specifically comprises:
Step S201, obtains the actual current variation characteristic curve of target street lamp;
In embodiment shown in this step with Fig. 1, the method for operating of step S101 is identical, is not repeated herein.
Step S202, judges whether the actual current variation characteristic curve of described acquisition and preset normalized current variation characteristic curve coincide;
Whether actual current variation characteristic curve and normalized current variation characteristic curve coincide, the judgement referred to is whether the goodness of fit of actual current variation characteristic curve and normalized current variation characteristic curve is in default error range, if the goodness of fit of actual current variation characteristic curve and normalized current variation characteristic curve is in default error range, then judge actual current variation characteristic curve and normalized current variation characteristic curves, if the goodness of fit of actual current variation characteristic curve and normalized current variation characteristic curve is not in default error range, then determine that actual current variation characteristic curve and normalized current variation characteristic curve are misfitted.
It should be noted that, the goodness of fit refers to the similarity degree of actual current variation characteristic curve and normalized current variation characteristic curve.When judging that the goodness of fit of actual current variation characteristic curve and normalized current variation characteristic curve is whether in default error range, determination methods is unrestricted, such as can adopt variance method or slope comparison method, other method that it may occur to persons skilled in the art that can certainly be adopted.
In this step, if judged result is no, namely when the actual current variation characteristic curve obtained and preset normalized current variation characteristic curve are misfitted, then perform step S203, if the determination result is YES, namely when the actual current variation characteristic curve obtained and preset normalized current variation characteristic curves, then step S204 is performed.
Step S203, determines that described target street lamp breaks down;
Step S204, determines that described target street lamp is working properly.
Please refer to Fig. 6, be the schematic flow sheet of the 3rd embodiment of a kind of street lamp fault detection method provided by the invention, described method comprises:
Step S301, within the cold start time, multi collect flows through the current signal of target street lamp, obtains and gathers moment multiple current value one to one;
Step S302, according to the plurality of current value, completes the drafting of the actual current variation characteristic curve of target street lamp;
It should be noted that, step S301-step S302 be embodiment illustrated in fig. 1 in a kind of embodiment of step S101.That is, when carrying out street lamp fault and detecting, the collection of actual current value is specifically carried out within the cold start time of target street lamp.Actual current variation characteristic curve is then when street lamp is in real work, according to the curve that the multiple not actual current value in the same time gathered in this street lamp cold start time are drawn.The reason that selection multi collect within the cold start time flows through the actual current of target street lamp is: within the cold start time, and current value change when target street lamp normally works obviously, is convenient to the drafting of actual current variation characteristic curve like this.Correspondingly, when pre-set criteria curent change family curve, the collection of standard current value also should be carried out within the cold start time.That is, in the present embodiment, normalized current variation characteristic curve specifically when target street lamp normally works, according to the curve that the multiple not standard current value in the same time gathered in the cold start time of this target street lamp are drawn.
Wherein, the cold start time should be a time period, and when specifically target street lamp normally works, the time used when just tending towards stability from cold start to its current value as shown in Figure 2.
In step s 302, multiple current values that can collect according to step S301, thus complete the drafting of actual current variation characteristic curve, this curve drawn out can react the curent change characteristic of target street lamp within the cold start time.When drawing actual current variation characteristic curve, such as the multiple current values collected can be labeled in (the horizontal ordinate representative collection moment of this coordinate system in coordinate axis, ordinate represents current value), then adopt level and smooth curve to be coupled together by multiple current value, actual current variation characteristic curve can be obtained.
Step S303, judges whether the actual current variation characteristic curve of described acquisition and preset normalized current variation characteristic curve coincide;
Wherein, the step S202 in the embodiment shown in this step with Fig. 2 is identical, is not repeated herein.
In this step, if judged result is no, namely when the actual current variation characteristic curve obtained and preset normalized current variation characteristic curve are misfitted, then perform step S304, if the determination result is YES, namely when the actual current variation characteristic curve obtained and preset normalized current variation characteristic curves, then step S305 is performed.
Step S304, determines that described target street lamp breaks down;
Step S305, determines that described target street lamp is working properly.
As shown in Figure 7, in one embodiment, step S202, namely judges whether the actual current variation characteristic curve of described acquisition and preset normalized current variation characteristic curve coincide, and comprising:
Step S401, judges whether the mean value of described multiple current value is less than default first threshold;
This step, in practical operation, first calculates the mean value of the multiple current values gathered within the cold start time, and then this mean value and the first threshold preset is compared, and judges whether this mean value is less than default first threshold.Wherein, first threshold is default, and this first threshold preset can according to application, and the model of target street lamp and the voltage at its two ends specifically set, and this first threshold is for judging the standard value whether this target street lamp breaks down.
In this step, if judged result is yes, namely when the mean value of multiple current value is less than default first threshold, then perform step S404, if judged result is no, namely when the mean value of multiple current value is greater than default first threshold, then perform step S402.Mean value for multiple current value equals the situation of default first threshold, can not process.
Step S402, judges that the goodness of fit of actual current variation characteristic curve and preset normalized current variation characteristic curve is whether in default error range;
Wherein, the error range preset is an acceptable error interval of concrete setting according to actual needs, and the goodness of fit refers to the similarity degree of actual current variation characteristic curve and normalized current variation characteristic curve.When judging the similarity degree of actual current variation characteristic curve and preset normalized current variation characteristic curve, variance method or slope comparison method can be adopted, also can adopt other method that those skilled in the art can expect.
According to the variation tendency of preset normalized current variation characteristic curve, within the cold start time, standard current value presents and reduces gradually and the trend tended towards stability.That is, for collection actual current value corresponding to moment multiple in the cold start time, current value corresponding to last collection moment necessarily gathers current value corresponding to moment than rear one large.Therefore, when comparing the similarity degree of two curves, slope comparison method can be adopted to calculate on actual current change curve, and former and later two gather the slope in moment, if this slope is negative value, then former and later two slopes gathering the moment that this slope is corresponding on standards change variation characteristic curve are compared, judge difference between these two slopes whether in the error range preset.
For example, if during the work of target street lamp, it is a1 that last collection moment T1 and rear gathers the slope that moment T2 forms, and a1<0, and in preset normalized current variation characteristic curve, the slope that last collection moment T1 and rear gathers the formation of moment T2 is that a2, a2<0. suppose that the error range preset is ± 0.01, so then needs to judge difference between a1 and a2 whether within default error range.If suppose, the absolute value of the difference △ a of a1 and a2 is greater than 0.01, then judge that the goodness of fit of actual current variation characteristic curve and normalized current variation characteristic curve is not in the error range preset, then perform step S404, if suppose, the absolute value of the difference △ a of a1 and a2 is less than 0.01, then judge that the goodness of fit of actual current variation characteristic curve and normalized current variation characteristic curve is in the error range preset, then enter step S403.
Certainly, when judging that the goodness of fit of actual current variation characteristic curve and normalized current variation characteristic curve is whether in default error range, can also variance method be used, be not described in detail at this.
Step S403, determines described actual current variation characteristic curve and preset normalized current variation characteristic curves;
Step S404, determines that described actual current variation characteristic curve and preset normalized current variation characteristic curve are misfitted.
As shown in Figure 8, in another embodiment, step S202 comprises:
Step S501, judges whether the mean value of described multiple current value is less than default first threshold;
This step with embodiment illustrated in fig. 7 in step S401 identical, do not repeat them here.If the determination result is YES, namely when the mean value of described multiple current value is less than default first threshold, then step S502 is performed; If judged result is no, when namely the mean value of described multiple current value is greater than default first threshold, then perform step S505.Mean value is equaled to the situation of first threshold, can not process.
Step S502, tentatively judges that open fault appears in this target street lamp;
Step S503, adding up and storing tentatively judges that the read-around ratio of open fault appears in this target street lamp;
In step S502, when tentatively judging that open fault appears in target street lamp, not making the conclusion that actual current variation characteristic curve and preset normalized current variation characteristic curve are misfitted at once, but carry out marking to preliminary judged result and store.
Before execution step S503, also need to know last preliminary judged result, if the preliminary judged result of last time is: tentatively judge that open fault appears in this target street lamp, then perform step S503, namely adding up and storing tentatively judges that the read-around ratio of open fault appears in this target street lamp.Otherwise, then only store this preliminary judged result, do not do accumulation operations.That is, at least double initial decision result is only had to be: when open fault appears in initial decision target street lamp, the read-around ratio of open fault appears in the target street lamp that just can add up.For example, if last time, preliminary judged result was: open fault appears in target street lamp, this preliminary judged result is: open fault appears in target street lamp, then can to occurring that the number of times of open fault carries out adding up and storing, that is, tentatively judge that target street lamp occurs that the read-around ratio of open fault is 2.
Step S504, judges that this target street lamp occurs whether the read-around ratio of open fault is greater than default Second Threshold;
In this step, the target street lamp stored in obtaining step S502 is needed to occur the read-around ratio of open fault, and target street lamp is occurred the read-around ratio of open fault compares with the Second Threshold preset, if judged result is yes, namely when target street lamp occurs that the read-around ratio of open fault is greater than default Second Threshold, then step S509 is performed.If judged result is no, namely when judging that target street lamp occurs that the number of times of open fault is not more than default Second Threshold, then get back to the current signal performing and to flow through described target street lamp at multi collect within the cold start time, obtain and the step gathering moment multiple current value one to one.Wherein, Second Threshold can specifically be arranged, and is understandable that, the Second Threshold preset generally should be more than or equal to 2.
It should be noted that, when the judged result of step S501 is for being, needs to perform step S502 and step S503, its objective is: be convenient to judge whether street lamp has occurred fault veritably more accurately, improving the accuracy that street lamp fault detects.Such as, for high-pressure mercury lamp, because it exists blow-out phenomenon, therefore, when detecting sodium vapor lamp and whether breaking down, then contingency may be there is.When therefore judging whether actual current variation characteristic curve and normalized current variation characteristic curve coincide, then need to perform step S502-step S504, and when the judged result of step S504 is for being, just judge that actual current variation characteristic curve and normalized current variation characteristic curve are misfitted, the false judgment caused because of blow-out can be avoided so as much as possible, and then the accuracy of street lamp fault detection can be improved.
Step S505, judges that the goodness of fit of actual current variation characteristic curve and preset normalized current variation characteristic curve is whether in default error range;
Wherein, the error range preset is an acceptable error interval of concrete setting according to actual needs.And the goodness of fit refers to the similarity degree of actual current variation characteristic curve and normalized current variation characteristic curve.When judging the similarity degree of actual current variation characteristic curve and preset normalized current variation characteristic curve, variance method or slope comparison method can be adopted.
According to the variation tendency of preset normalized current variation characteristic curve, within the cold start time, standard current value presents and reduces gradually and the trend tended towards stability.That is, for collection actual current value corresponding to moment multiple in the cold start time, current value corresponding to last collection moment necessarily gathers current value corresponding to moment than rear one large.Therefore, when comparing the similarity degree of two curves, slope comparison method can be adopted to calculate on actual current change curve, and former and later two gather the slope in moment, if this slope is negative value, then former and later two slopes gathering the moment that this slope is corresponding on standards change variation characteristic curve are compared, judge difference between these two slopes whether in the error range preset.
For example, if during the work of target street lamp, it is a1 that last collection moment T1 and rear gathers the slope that moment T2 forms, and cut a1<0, and in preset normalized current variation characteristic curve, the slope that last collection moment T1 and rear gathers the formation of moment T2 is that a2, a2<0. suppose that the error range preset is ± 0.01, so then needs to judge difference between a1 and a2 whether within default error range.If suppose, the absolute value of the difference △ a of a1 and a2 is greater than 0.01, then judge that the goodness of fit of actual current variation characteristic curve and normalized current variation characteristic curve is not in the error range preset, then perform step S506, if if the absolute value of the difference △ a of hypothesis a1 and a2 is less than 0.01, then judge that the goodness of fit of actual current variation characteristic curve and normalized current variation characteristic curve is in the error range preset, then perform the current signal that multi collect within the cold start time flows through described target street lamp, obtain and the step gathering moment multiple current value one to one.
Certainly, when judging that the goodness of fit of actual current variation characteristic curve and normalized current variation characteristic curve is whether in default error range, can also variance method be adopted, no longer be described in detail at this.
Step S506, tentatively judges that short trouble appears in described target street lamp;
Step S507, adding up and storing tentatively judges that the read-around ratio of short trouble appears in described target street lamp;
In step S506, when tentatively judging that short trouble appears in target street lamp, not making the conclusion that actual current variation characteristic curve and preset normalized current variation characteristic curve are misfitted at once, but carry out marking to preliminary judged result and store.
Before execution step S507, also need to know last preliminary judged result, if the preliminary judged result of last time is: tentatively judge that short trouble appears in this target street lamp, then perform step S507, namely adding up and storing tentatively judges that the read-around ratio of short trouble appears in this target street lamp.Otherwise, then only store this preliminary judged result, do not do accumulation operations.That is, when only having at least double initial decision target street lamp to occur short trouble, there is the read-around ratio of short trouble in the target street lamp that just can add up.For example, if last time, preliminary judged result was: short trouble appears in target street lamp, this preliminary judged result is: short trouble appears out in target street lamp, then can to occurring that the number of times of short trouble carries out adding up and storing, that is, the preliminary judgement target street lamp of storage occurs that the read-around ratio of short trouble is 2.
Step S508, judges that described target street lamp occurs whether the read-around ratio of short trouble is greater than the 3rd default threshold value;
In this step, the target street lamp stored in obtaining step S507 is needed to occur the read-around ratio of short trouble, and target street lamp is occurred the read-around ratio of short trouble compares with the 3rd threshold value preset, if judged result is yes, namely when target street lamp occurs that the read-around ratio of short open fault is greater than the 3rd default threshold value, then step S509 is performed.If judged result is no, namely when judging that target street lamp occurs that the number of times of short trouble is not more than the 3rd default threshold value, then get back to and perform multi collect within the cold start time and flow through the current signal of described target street lamp, obtain and the step gathering moment multiple current value one to one.Wherein, the 3rd threshold value can specifically be arranged, and is understandable that, the Second Threshold preset generally should be more than or equal to 2.
It should be noted that, when the judged result of step S505 is no, needs to perform step S506--step S507, its objective is: be convenient to judge whether street lamp has occurred fault veritably more accurately, improve the accuracy detecting street lamp and whether break down.Such as, for high-pressure mercury lamp, because it exists blow-out phenomenon, therefore, when detecting sodium vapor lamp and whether breaking down, then contingency may be there is.When therefore judging whether actual current variation characteristic curve and normalized current variation characteristic curve coincide, then need to perform step S505-step S508, and when the judged result of step S508 is for being, when just judging whether actual current variation characteristic curve and normalized current variation characteristic curve coincide, the false judgment caused because of blow-out can be avoided so as much as possible, and then the accuracy of street lamp fault detection can be improved.
Step S509, determines that described actual current variation characteristic curve and normalized current variation characteristic curve are misfitted.
As shown in Figure 9, be the schematic flow sheet of the 4th embodiment of a kind of street lamp fault detection method provided by the invention, described method comprises:
Step S601, the mode senses flow be coupled with described target street lamp by current transformer crosses the current signal of target street lamp;
In step s 601, by being coupled of current transformer and target street lamp, thus current transformer is made can to sense the current signal flowing through target street lamp.
Step S602, within the cold start time, multi collect flows through the current signal of described target street lamp, obtains and gathers moment multiple current value one to one;
Step S603, according to described multiple current value, completes the drafting of the actual current variation characteristic curve of described target street lamp;
Step S604, judges whether the actual current variation characteristic curve of described acquisition and preset normalized current variation characteristic curve coincide;
In this step, if judged result is no, namely when the actual current variation characteristic curve obtained and preset normalized current variation characteristic curve are misfitted, then perform step S605, if the determination result is YES, namely when the actual current variation characteristic curve obtained and preset normalized current variation characteristic curves, then step S606 is performed.
Step S605, determines that described target street lamp breaks down;
Step S606, determines that described target street lamp is working properly.
When adopting the method described in the present embodiment to carry out street lamp fault detection, whether the actual current variation characteristic curve of target street lamp and preset normalized current variation characteristic curve coincide due to what compare, therefore, when there is short trouble in target street lamp, the actual current variation characteristic curve of target street lamp is inevitable misfits with normalized current variation characteristic curve, therefore, it is possible to detect the street lamp broken down exactly, especially the street lamp occurring electrical type ballast resistor or inductor ballast fails can be judged exactly, thus improve the accuracy of street lamp fault detection, avoid the problem that can not detect the street lamp broken down when adopting traditional amplitude threshold method to detect street lamp fault.
Above-mentioned Fig. 1-Fig. 9 is described in detail street lamp fault detection method provided by the invention, below in conjunction with Figure 10-Figure 12, is described in detail to the concrete structure realizing said method.
As shown in Figure 10, be the structural representation of the first embodiment of road lamp failure detection device provided by the invention, this road lamp failure detection device 1 comprises:
Acquisition module 11, for obtaining the actual current change curve of target street lamp;
Wherein, target street lamp of the present invention, can be mounted in the street lamp on road cowl lamp bar, also can be hang over the street lamp on tunnel wall, and the type of street lamp includes but not limited to high-pressure mercury lamp, Non-polarized lamp, conventional LED and light-adjustable LED lamp.The actual current variation characteristic curve that acquisition module 11 obtains, is used to the curve flowing through the variation characteristic of street lamp actual current when identifying target street lamp real work.When this actual current variation characteristic curve is specifically according to the real work of target street lamp, draws in the multiple actual current value not flowing through target street lamp in the same time and form.Therefore, acquisition module 11 before the actual current variation characteristic curve obtaining target street lamp, road lamp failure detection device also need multiple not in the same time acquisition stream cross the actual current of target street lamp.The number of times gathering actual current value is more, and the actual current variation characteristic curve drawn out is more close to the actual current variation tendency of target street lamp.
Particularly, described acquisition module 11 is when obtaining the actual current change curve of target street lamp, specifically within the cold start time, multi collect flows through the current signal of described target street lamp, obtain and gather moment multiple current value one to one, and according to described multiple current value, complete the drafting of the actual current variation characteristic curve of described target street lamp.
Wherein, acquisition module 11 selects the reason that multi collect within the cold start time flows through the actual current of target street lamp to be: within the cold start time, current value change when target street lamp normally works obviously, is convenient to the drafting of actual current variation characteristic curve like this.Correspondingly, road lamp failure detection device is when pre-set criteria curent change family curve, and the collection of normalized current changing value also should be carried out within the cold start time.That is, in the present embodiment, normalized current variation characteristic curve specifically when target street lamp normally works, according to the curve that the multiple not standard current value in the same time gathered in the cold start time of this target street lamp are drawn.
Wherein, the cold start time should be a time period, and when specifically target street lamp normally works, the time used when just tending towards stability from cold start to its current value as shown in Figure 2.
After collecting multiple current value, acquisition module 11 also needs the drafting completing actual current variation characteristic curve according to the multiple current values collected.This curve drawn out can react the curent change characteristic of target street lamp within the cold start time.When drawing actual current variation characteristic curve, such as the multiple current values collected can be labeled in (the horizontal ordinate representative collection moment of this coordinate system in coordinate axis, ordinate represents current value), then adopt level and smooth curve to be coupled together by multiple current value, actual current variation characteristic curve can be obtained.
Fault determination module 12, when misfitting for the actual current family curve that obtains at described acquisition module 11 and preset normalized current variation characteristic curve, determines that described target street lamp breaks down.
Wherein, normalized current variation characteristic curve, is used to identify the curve flowing through the variation characteristic of the normalized current of target street lamp when target street lamp normally works.This normalized current variation characteristic curve is when specifically target street lamp normally works, the multiple standard current value not flowing through target street lamp are in the same time drawn and are formed, and are specifically drawn by the multiple not standard current value in the same time gathered in the cold start time of this target street lamp.Therefore, road lamp failure detection device, when pre-set criteria curent change family curve, needs the standard current value of multi collect target street lamp.The number of times gathering standard current value is more, and the normalized current variation characteristic curve drawn out just precisely.
If target street lamp normally works, so this target street lamp is from cold start to normal work, and the electric current flowing through street lamp has obvious change.As shown in Figure 2 (V1 is less than V2), its curent change trend step-down tending towards stability gradually.When the ballast resistor of street lamp is short-circuited fault or open fault, its curent change is all not obvious, as shown in Figure 3,4.Therefore, when carrying out street lamp fault and detecting, according to traditional amplitude threshold method, so when the inductor ballast resistor of street lamp breaks down, owing to flowing through the curent change of street lamp when being short-circuited fault or open fault and not obvious, therefore, adopt traditional amplitude thresholding rule to there is the problem that can not detect the street lamp broken down exactly, thus when making to carry out street lamp fault detection, misdetection rate is higher.And adopt the method described in the present embodiment to carry out street lamp fault detection, whether the actual current variation characteristic curve of target street lamp and preset normalized current variation characteristic curve coincide due to what compare, therefore, when there is short trouble in target street lamp, the actual current variation characteristic curve of target street lamp is inevitable misfits with normalized current variation characteristic curve, therefore the method for the embodiment of the present invention is adopted can to detect the street lamp broken down exactly, especially the street lamp occurring electrical type ballast resistor or inductor ballast fails can be detected exactly, thus improve the accuracy of carrying out when street lamp fault detects.
Further, this road lamp failure detection device 1 also comprises:
Judge module 13, for judging whether the actual current change curve that described acquisition module 11 obtains and preset normalized current variation characteristic curve coincide;
Described fault determination module 12, specifically for when the judged result of described judge module 13 is no, determines that described target street lamp breaks down.
Wherein, judge module 13 is when judging actual current change curve and preset normalized current variation characteristic curve whether coincide, judge that the goodness of fit of actual current variation characteristic curve and normalized current variation characteristic curve is whether in default error range, if the goodness of fit of actual current variation characteristic curve and normalized current variation characteristic curve is in default error range, then determine actual current variation characteristic curve and normalized current variation characteristic curves, if the goodness of fit of actual current variation characteristic curve and normalized current variation characteristic curve is not in default error range, then determine that actual current variation characteristic curve and normalized current variation characteristic curve are misfitted.
Wherein, the error range preset is an acceptable error interval of concrete setting according to actual needs.And the goodness of fit refers to the similarity degree of actual current variation characteristic curve and normalized current variation characteristic curve.Such as, in one embodiment, judge module 13, when judging that the goodness of fit of actual current change curve and preset normalized current variation characteristic curve is whether in the error range preset, can adopt variance method or slope comparison method.
According to the variation tendency of preset normalized current variation characteristic curve, within the cold start time, standard current value presents and reduces gradually and the trend tended towards stability.That is, for collection actual current value corresponding to moment multiple in the cold start time, current value corresponding to last collection moment necessarily gathers current value corresponding to moment than rear one large.Therefore, when comparing the similarity degree of two curves, slope comparison method can be adopted to calculate on actual current change curve, and former and later two gather the slope in moment, if this slope is negative value, then former and later two slopes gathering the moment that this slope is corresponding on standards change variation characteristic curve are compared, judge difference between these two slopes whether in the error range preset.
For example, if during the work of target street lamp, it is a1 that last collection moment T1 and rear gathers the slope that moment T2 forms, and cut a1<0, and in preset normalized current variation characteristic curve, the slope that last collection moment T1 and rear gathers the formation of moment T2 is that a2, a2<0. suppose that the error range preset is ± 0.01, so then needs to judge difference between a1 and a2 whether within default error range.If suppose, the absolute value of the difference △ a of a1 and a2 is greater than 0.01, then judge that the goodness of fit of actual current variation characteristic curve and normalized current variation characteristic curve is not in the error range preset, and then determine that actual current variation characteristic curve and normalized current variation characteristic curve are misfitted.If suppose, the absolute value of the difference △ a of a1 and a2 is less than 0.01, then judge that the goodness of fit of actual current variation characteristic curve and normalized current variation characteristic curve is in the error range preset, and then determine actual current variation characteristic curve and normalized current variation characteristic curves.
Certainly, when judging that the goodness of fit of actual current variation characteristic curve and normalized current variation characteristic curve is whether in default error range, can also variance method be adopted, be not described in detail at this.
Please refer to Figure 11, be the structural representation of the second embodiment of road lamp failure detection device provided by the invention, the difference of the embodiment shown in the present embodiment and Figure 10 is, this road lamp failure detection device also comprises:
Testing result reporting module 14, after determining that described target street lamp breaks down in described fault determination module 12, reports to control center by the testing result that described target street lamp breaks down.
The testing result that street lamp breaks down, after fault determination module 12 determines that target street lamp breaks down, can be reported control center by testing result reporting module 14 in time.So, the result that the keeper of control center then can receive according to control center, arranges maintenance personal to keep in repair the target street lamp broken down, to ensure the normal illumination demand in city in time.
Correspondingly, present invention also offers a kind of street lamp fault detection system, as shown in figure 12, described street lamp fault detection system 2 comprises:
At least one road lamp failure detection device 1, for when the actual current family curve of described target street lamp and preset normalized current variation characteristic curve are misfitted, determine that described target street lamp breaks down, and the testing result that described target street lamp breaks down is reported to central control unit;
Central control unit 3, for receiving and analyzing the testing result that described road lamp failure detection device reports, and presents to keeper by the particular location of the target street lamp broken down.
In street lamp fault detection system provided by the invention, road lamp failure detection device 1 is when the actual current family curve and preset normalized current variation characteristic curve that judge target street lamp are misfitted, namely determine that this target street lamp breaks down, and the testing result that target street lamp occurs is reported central control unit 2.
Central control unit 2, after receiving the result that road lamp failure detection device 1 reports, is analyzed testing result, is determined the particular location of the street lamp broken down and present to keeper.So, keeper then can arrange maintenance personal to keep in repair the target street lamp broken down in time, to ensure the normal illumination demand in city.
The above embodiment of the present invention is only for example of the present invention is described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, other multi-form change and variations can also be made on the basis of the above description, cannot give all embodiments exhaustive here.Every belong to technical scheme of the present invention the apparent change of amplifying out or variation be still in the row of protection scope of the present invention.
Claims (5)
1. street lamp fault detection method, is characterized in that, comprises the steps:
Obtain the actual current variation characteristic curve of target street lamp and judge whether the actual current variation characteristic curve of described acquisition and preset normalized current variation characteristic curve coincide; When the actual current variation characteristic curve of described acquisition and preset normalized current variation characteristic curve are misfitted, then determine that described target street lamp breaks down;
The step of the actual current variation characteristic curve of above-mentioned acquisition target street lamp, specifically comprises: within the cold start time, multi collect flows through the current signal of described target street lamp, obtains and gathers moment multiple current value one to one; According to described multiple current value, complete the drafting of the actual current variation characteristic curve of described target street lamp;
Judge the step whether the actual current variation characteristic curve of described acquisition and preset normalized current variation characteristic curve coincide, specifically comprise: when the mean value of described multiple current value is less than default first threshold, then tentatively judge that open fault appears in described target street lamp; Add up and store and tentatively judge that the read-around ratio of open fault appears in described target street lamp; When described target street lamp occurs that the read-around ratio of open fault is greater than default Second Threshold, then determine that described actual current variation characteristic curve and normalized current variation characteristic curve are misfitted; When the mean value of described multiple current value be greater than default first threshold and the goodness of fit of described actual current variation characteristic curve and preset normalized current variation characteristic curve not in default error range time, then tentatively judge that short trouble appears in described target street lamp; Add up and store and tentatively judge that the read-around ratio of short trouble appears in described target street lamp; When described target street lamp occurs that the read-around ratio of short trouble is greater than the 3rd default threshold value, then determine that described actual current variation characteristic curve and normalized current variation characteristic curve are misfitted; Wherein, the goodness of fit refers to the similarity degree of actual current variation characteristic curve and normalized current variation characteristic curve.
2. be applied to the road lamp failure detection device of street lamp fault detection method as claimed in claim 1, it is characterized in that, comprising:
Acquisition module, for obtaining the actual current change curve of target street lamp;
Judge module, for judging whether the actual current change curve that described acquisition module obtains and preset normalized current variation characteristic curve coincide;
Fault determination module, when misfitting for the actual current family curve that obtains at described acquisition module and preset normalized current variation characteristic curve, determines that described target street lamp breaks down; It, specifically for when the judged result of described judge module is no, determines that described target street lamp breaks down.
3. road lamp failure detection device as claimed in claim 2, it is characterized in that, described acquisition module flows through the current signal of described target street lamp specifically for multi collect within the cold start time, obtain and gather moment multiple current value one to one, and according to described multiple current value, complete the drafting of the actual current variation characteristic curve of described target street lamp.
4. road lamp failure detection device as claimed in claim 2 or claim 3, is characterized in that, also comprise:
Testing result reporting module, after determining that in described fault determination module described target street lamp breaks down, reports to control center by the testing result that described target street lamp breaks down.
5. be applied to the street lamp fault detection system of street lamp fault detection method as claimed in claim 1, it is characterized in that, comprising:
At least one road lamp failure detection device, for when the actual current family curve of target street lamp and preset normalized current variation characteristic curve are misfitted, determine that described target street lamp breaks down, and the testing result that described target street lamp breaks down is reported to central control unit;
Central control unit, for receiving and analyzing the testing result that described road lamp failure detection device reports, and presents to keeper by the particular location of the target street lamp broken down.
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